/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc=new Scanner(System.in);
	               int n;
		 String str;
		 str=sc.next();
	             String str1;
	             str1=sc.next();
        
                 String str2=str+str1;
                  	
                  
                  System.out.println(str2);
                  
          }
   
  
 
	
}
